The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 04, 2022
Filed:
Oct. 09, 2020
Schweitzer Engineering Laboratories, Inc., Pullman, WA (US);
Marcos A. Donolo, Pullman, WA (US);
Jay Hartshorn, Moscow, ID (US);
Subhash C. Patel, West Chester, PA (US);
Vinod K. Yedidi, King of Prussia, PA (US);
Jianchun Qin, Norristown, PA (US);
Schweitzer Engineering Laboratories, Inc., Pullman, WA (US);
Abstract
An intelligent electronic device (IED) according to the present disclosure can estimate a full load rotor resistance value as a function of motor positive-sequence resistance. The IED may estimate the full load rotor resistance value by measuring zero-crossings of voltage after a motor disconnect. The IED may also acquire motor current and voltage measurements and calculate motor slip using the acquired motor current and voltage measurements and the estimated full load rotor resistance value.